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NNikon Standard

The Nikon Standard for “shots per charge” battery information for its cameras is based on testing done by Nikon Inc.

Example: A Nikon D3 equipped with an AF-S VR 70–200mm f/2.8 ED lens captured 4,700 images when measured at 20 °C/68 °F under the following test conditions: image quality set to JPEG normal; image size set to L (large); shutter speed 1/250 sec.; shutter-release button pressed halfway for three seconds and focus cycled from infinity to minimum range three times; six shots taken in succession with the monitor turned on for five seconds and then turned off; cycle repeated once exposure meters have turned off.

Real life results will vary depending on factors such as temperature, use conditions and the number of times the battery is recharged.

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Optical Low-Pass Filter
A filter fitted in front of the image sensor to reduce moiré by filtering ultraviolet and infrared light.
Optical Viewfinder
The window in which the photographer frames the subject and checks focus. Find out more.
Overexposure
The result of the film or image sensor receiving too much light.
Orthochromatic Filter
A green or yellow-green filter used with black-and-white film, it compensates for the difference between the color sensitivity of film and the relative luminous efficiency of the human eye for more natural-looking pictures.
Open Flash
Refers to firing a flash unit with the shutter open. In long time exposures (at Bulb or Time setting), repeatedly firing a the flash creates a multiple-exposure, stroboscopic effect.
Optical Storage
See storage device
Optical VR
See VR
Overlap Servo
An autofocus method that provides continuous focus detection and calculation as the lens is being driven, allowing you to perform faster, more precise autofocusing, especially with moving subjects.